black0077

it isn't yami,its hiroto now

he can't use magic spell's. he can only produce dark magic. and he is imitating the spell through his actions. not as powerful as the original spell just an imitation

yami/hiroto didn't land up in the same place as in canon. thus he did not meet julius.(butterfly effect)

yami did not know the language, but hiroto does.(the language is english /perks of being a transmigrated).